commit 6721b831375fd3f26f680aa21742f50cc6f0174a
Author: Mika <kontakt@donau2space.de>
Date:   Sun Feb 22 03:07:03 2026 +0000

    Add logger_script/src/logger_script/core.py

diff --git a/logger_script/src/logger_script/core.py b/logger_script/src/logger_script/core.py
new file mode 100644
index 0000000..da33858
--- /dev/null
+++ b/logger_script/src/logger_script/core.py
@@ -0,0 +1,85 @@
+import json
+import time
+import random
+from datetime import datetime
+from dataclasses import dataclass, asdict
+from pathlib import Path
+from typing import List, Dict
+
+
+@dataclass
+class LogEntry:
+    timestamp: str
+    intensity: float
+
+
+_BUFFER: List[LogEntry] = []
+_OUTPUT_PATH = Path("output/logs.json")
+
+
+def _validate_intensity(value: float) -> float:
+    if not isinstance(value, (int, float)):
+        raise TypeError(f"Intensity must be a number, got {type(value)}")
+    return float(value)
+
+
+def start_logging(duration: int) -> List[Dict[str, float]]:
+    """Startet die Datenerfassung vom USB-Spektrometer.
+
+    In dieser Simulation werden Zufallswerte erzeugt, um reale Messungen zu imitieren.
+    """
+    if not isinstance(duration, int) or duration <= 0:
+        raise ValueError("Duration must be a positive integer.")
+
+    global _BUFFER
+    _BUFFER.clear()
+    start_time = time.time()
+
+    while time.time() - start_time < duration:
+        intensity = random.uniform(0.0, 1000.0)  # Simulated sensor value
+        intensity = _validate_intensity(intensity)
+        entry = LogEntry(timestamp=datetime.utcnow().isoformat(), intensity=intensity)
+        _BUFFER.append(entry)
+        time.sleep(1)
+
+    result = [asdict(e) for e in _BUFFER]
+    return result
+
+
+def flush_buffer() -> None:
+    """Schreibt gepufferte Daten sicher auf die Festplatte und leert den Zwischenspeicher."""
+    global _BUFFER
+    if not _BUFFER:
+        return
+
+    _OUTPUT_PATH.parent.mkdir(parents=True, exist_ok=True)
+    existing_data = []
+
+    if _OUTPUT_PATH.exists():
+        try:
+            with open(_OUTPUT_PATH, 'r', encoding='utf-8') as f:
+                existing_data = json.load(f)
+        except (json.JSONDecodeError, OSError):
+            existing_data = []
+
+    with open(_OUTPUT_PATH, 'w', encoding='utf-8') as f:
+        json.dump(existing_data + [asdict(e) for e in _BUFFER], f, indent=2)
+
+    _BUFFER.clear()
+
+
+def moving_avg(data: List[float], window: int) -> List[float]:
+    """Berechnet den gleitenden Mittelwert über eine Datenreihe."""
+    if not isinstance(data, list) or not all(isinstance(x, (int, float)) for x in data):
+        raise TypeError("Data must be a list of numeric values.")
+    if not isinstance(window, int) or window <= 0:
+        raise ValueError("Window must be a positive integer.")
+    if window > len(data):
+        raise ValueError("Window size cannot exceed data length.")
+
+    smoothed = []
+    for i in range(len(data) - window + 1):
+        segment = data[i:i + window]
+        avg_value = sum(segment) / window
+        smoothed.append(avg_value)
+    return smoothed